I created my own bottom app bar following a tutorial. However, there is a white space between the bottom nav bar and the bottom of the screen. I colored this space in white to show it. How can I make my container the actual nav bar and hide that space?
This is happening on all of my screens in the app regardless if they begin with a scaffold, column, container etc.
import 'package:flutter/material.dart';
class bottomAppBar extends StatelessWidget {
const bottomAppBar({
Key? key,
}) : super(key: key);
#override
Widget build(BuildContext context) {
return BottomAppBar(
color: Colors.white,
child: Container(
color: Color(0xFF313131).withOpacity(0.7),
height: 50,
width: double.maxFinite,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
IconButton(
onPressed: () {
Navigator.pushNamed(context, '/');
},
icon: Icon(
Icons.home,
color: Colors.white,
),
),
IconButton(
onPressed: () {
Navigator.pushNamed(context, '/discover');
},
icon: Icon(
Icons.search,
color: Colors.white,
),
),
IconButton(
onPressed: () {
Navigator.pushNamed(context, '/mybookings');
},
icon: Icon(
Icons.hello,
color: Colors.white,
),
),
IconButton(
onPressed: () {
Navigator.pushNamed(context, '/user');
},
icon: Icon(
Icons.person,
color: Colors.white,
),
),
],
),
),
);
}
}
This happens because you use the scaffold propery from the materail app. But, never wrap the widget with the scaffold widget.
After wraping the widget in scaffold use the bottomNavigationBar property to put your BottomAppBar. Then every thing will work perfect.
Thank you.
Code (Your updated code)
import 'package:flutter/material.dart';
class bottomAppBar extends StatelessWidget {
const bottomAppBar({
Key? key,
}) : super(key: key);
#override
Widget build(BuildContext context) {
return Scaffold(
bottomNavigationBar: BottomAppBar(
color: Colors.white,
child: Container(
color: Color(0xFF313131).withOpacity(0.7),
height: 50,
width: double.maxFinite,
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: [
IconButton(
onPressed: () {
// Navigator.pushNamed(context, '/');
},
icon: Icon(
Icons.home,
color: Colors.white,
),
),
IconButton(
onPressed: () {
// Navigator.pushNamed(context, '/discover');
},
icon: Icon(
Icons.search,
color: Colors.white,
),
),
IconButton(
onPressed: () {
// Navigator.pushNamed(context, '/mybookings');
},
icon: Icon(
Icons.ac_unit,
color: Colors.white,
),
),
IconButton(
onPressed: () {
// Navigator.pushNamed(context, '/user');
},
icon: Icon(
Icons.person,
color: Colors.white,
),
),
],
),
),
),
);
}
}
Output Screen
How can I create something similar to a FloatingActionButton?
RawMaterialButton is better suited I think.
RawMaterialButton(
onPressed: () {},
elevation: 2.0,
fillColor: Colors.white,
child: Icon(
Icons.pause,
size: 35.0,
),
padding: EdgeInsets.all(15.0),
shape: CircleBorder(),
)
Update (use new ElevatedButton)
ElevatedButton (with less customizations)
ElevatedButton(
onPressed: () {},
child: Icon(Icons.menu, color: Colors.white),
style: ElevatedButton.styleFrom(
shape: CircleBorder(),
padding: EdgeInsets.all(20),
backgroundColor: Colors.blue, // <-- Button color
foregroundColor: Colors.red, // <-- Splash color
),
)
ElevatedButton (with more customizations)
ElevatedButton(
onPressed: () {},
child: Icon(Icons.menu),
style: ButtonStyle(
shape: MaterialStateProperty.all(CircleBorder()),
padding: MaterialStateProperty.all(EdgeInsets.all(20)),
backgroundColor: MaterialStateProperty.all(Colors.blue), // <-- Button color
overlayColor: MaterialStateProperty.resolveWith<Color?>((states) {
if (states.contains(MaterialState.pressed)) return Colors.red; // <-- Splash color
}),
),
)
Using InkWell
ClipOval(
child: Material(
color: Colors.blue, // Button color
child: InkWell(
splashColor: Colors.red, // Splash color
onTap: () {},
child: SizedBox(width: 56, height: 56, child: Icon(Icons.menu)),
),
),
)
Output (same for the last two):
You just need to use the shape: CircleBorder()
MaterialButton(
onPressed: () {},
color: Colors.blue,
textColor: Colors.white,
child: Icon(
Icons.camera_alt,
size: 24,
),
padding: EdgeInsets.all(16),
shape: CircleBorder(),
)
You can use InkWell to do that:
A rectangular area of a Material that responds to touch.
Below example demonstrate how to use InkWell. Notice: you don't need StatefulWidget to do that. I used it to change the state of the count.
Example:
import 'package:flutter/material.dart';
class SettingPage extends StatefulWidget {
#override
_SettingPageState createState() => new _SettingPageState();
}
class _SettingPageState extends State<SettingPage> {
int _count = 0;
#override
Widget build(BuildContext context) {
return new Scaffold(
body: new Center(
child: new InkWell(// this is the one you are looking for..........
onTap: () => setState(() => _count++),
child: new Container(
//width: 50.0,
//height: 50.0,
padding: const EdgeInsets.all(20.0),//I used some padding without fixed width and height
decoration: new BoxDecoration(
shape: BoxShape.circle,// You can use like this way or like the below line
//borderRadius: new BorderRadius.circular(30.0),
color: Colors.green,
),
child: new Text(_count.toString(), style: new TextStyle(color: Colors.white, fontSize: 50.0)),// You can add a Icon instead of text also, like below.
//child: new Icon(Icons.arrow_forward, size: 50.0, color: Colors.black38)),
),//............
),
),
);
}
}
If you want to get benefit of splashColor, highlightColor, wrap InkWell widget using a Material widget with material type circle. And then remove decoration in Container widget.
Outcome:
If you need a background image, you can use CircleAvatar with IconButton. Set the backgroundImage property.
CircleAvatar(
backgroundImage: NetworkImage(userAvatarUrl),
)
Example with button:
CircleAvatar(
backgroundColor: Colors.blue,
radius: 20,
child: IconButton(
padding: EdgeInsets.zero,
icon: Icon(Icons.add),
color: Colors.white,
onPressed: () {},
),
),
You can easily do the following:
FlatButton(
onPressed: () {
},
child: new Icon(
Icons.arrow_forward,
color: Colors.white,
size: 20.0,
),
shape: new CircleBorder(),
color: Colors.black12,
)
The result is
RaisedButton is depricated,
now you can create this by ElevatedButton.
ElevatedButton(
onPressed: () {},
child: Icon(Icons.add, color: Colors.white),
style: ElevatedButton.styleFrom(
shape: CircleBorder(),
padding: EdgeInsets.all(20),
primary: Colors.blue,
onPrimary: Colors.black,
),
)
RawMaterialButton(
onPressed: () {},
constraints: BoxConstraints(),
elevation: 2.0,
fillColor: Colors.white,
child: Icon(
Icons.pause,
size: 35.0,
),
padding: EdgeInsets.all(15.0),
shape: CircleBorder(),
)
note down constraints: BoxConstraints(), it's for not allowing padding in left.
Happy fluttering!!
There actually is an example how to create a circle IconButton similar to the FloatingActionButton.
Ink(
decoration: const ShapeDecoration(
color: Colors.lightBlue,
shape: CircleBorder(),
),
child: IconButton(
icon: Icon(Icons.home),
onPressed: () {},
),
)
To create a local project with this code sample, run:
flutter create --sample=material.IconButton.2 mysample
Using ElevatedButton:
ElevatedButton(
onPressed: () {},
child: Icon(
Icons.add,
color: Colors.white,
size: 60.0,
),
style: ElevatedButton.styleFrom(
shape: CircleBorder(), primary: Colors.green),
)
2021
If you need it flat (no elevation) as FlatButton is now deprecated.
TextButton(
onPressed: (){},
child: Icon(Icons.arrow_back),
style: ButtonStyle(
backgroundColor: MaterialStateProperty.all(Colors.black26),
shape: MaterialStateProperty.all(const CircleBorder())),
);
I created a version with correct clipping, elevation and border. Feel free to customize it.
Material(
elevation: 2.0,
clipBehavior: Clip.hardEdge,
borderRadius: BorderRadius.circular(50),
color: Colors.white,
child: InkWell(
onTap: () => null,
child: Container(
padding: EdgeInsets.all(9.0),
decoration: BoxDecoration(
shape: BoxShape.circle,
border: Border.all(color: Colors.blue, width: 1.4)),
child: Icon(
Icons.menu,
size: 22,
color: Colors.red,
),
),
),
)),
I used this one because I like the customisation of the border-radius and size.
Material( // pause button (round)
borderRadius: BorderRadius.circular(50), // change radius size
color: Colors.blue, //button colour
child: InkWell(
splashColor: Colors.blue[900], // inkwell onPress colour
child: SizedBox(
width: 35,height: 35, //customisable size of 'button'
child: Icon(Icons.pause,color: Colors.white,size: 16,),
),
onTap: () {}, // or use onPressed: () {}
),
),
Material( // eye button (customised radius)
borderRadius: BorderRadius.only(
topRight: Radius.circular(10.0),
bottomLeft: Radius.circular(50.0),),
color: Colors.blue,
child: InkWell(
splashColor: Colors.blue[900], // inkwell onPress colour
child: SizedBox(
width: 40, height: 40, //customisable size of 'button'
child: Icon(Icons.remove_red_eye,color: Colors.white,size: 16,),),
onTap: () {}, // or use onPressed: () {}
),
),
There are many ways to create the circle icon button in Flutter. Each of the examples below will use a different method.
Using ElevatedButton + Icon (recommended)
Using MaterialButton
ClipOval + Material + InkWell + Padding + Icon
IconButton + CircleAvatar
Ink + IconButton
Using ElevatedButton + Icon
ElevatedButton(
style: ElevatedButton.styleFrom(
shape: const CircleBorder(),
padding: const EdgeInsets.all(30)
),
child: const Icon(
Icons.add,
size: 50,
),
onPressed: () {},
),
Output:
Using MaterialButton
MaterialButton(
shape: const CircleBorder(),
color: Colors.red,
padding: const EdgeInsets.all(20),
onPressed: () {},
child: const Icon(
Icons.star,
size: 50,
color: Colors.yellow,
),
)
Output:
ClipOval + Material + InkWell + Padding + Icon
ClipOval(
child: Material(
color: Colors.blue,
child: InkWell(
onTap: () {},
child: const Padding(
padding: EdgeInsets.all(20),
child: Icon(
Icons.plus_one,
size: 50,
color: Colors.white,
),
),
),
),
)
Output:
IconButton + CircleAvatar
CircleAvatar(
radius: 50,
backgroundColor: Colors.amber,
child: IconButton(
color: Colors.black,
padding: const EdgeInsets.all(20),
iconSize: 50,
icon: const Icon(Icons.shop),
onPressed: () {
// do something
}),
),
Output:
Ink + IconButton
Ink(
decoration:
const ShapeDecoration(
shape: CircleBorder(),
color: Colors.purple
),
child: IconButton(
icon: const Icon(Icons.arrow_back),
iconSize: 30,
color: Colors.white,
onPressed: () {},
),
)
Output:
My contribution:
import 'package:flutter/material.dart';
///
/// Create a circle button with an icon.
///
/// The [icon] argument must not be null.
///
class CircleButton extends StatelessWidget {
const CircleButton({
Key key,
#required this.icon,
this.padding = const EdgeInsets.all(8.0),
this.color,
this.onPressed,
this.splashColor,
}) : assert(icon != null),
super(key: key);
/// The [Icon] contained ny the circle button.
final Icon icon;
/// Empty space to inscribe inside the circle button. The [icon] is
/// placed inside this padding.
final EdgeInsetsGeometry padding;
/// The color to fill in the background of the circle button.
///
/// The [color] is drawn under the [icon].
final Color color;
/// The callback that is called when the button is tapped or otherwise activated.
///
/// If this callback is null, then the button will be disabled.
final void Function() onPressed;
/// The splash color of the button's [InkWell].
///
/// The ink splash indicates that the button has been touched. It
/// appears on top of the button's child and spreads in an expanding
/// circle beginning where the touch occurred.
///
/// The default splash color is the current theme's splash color,
/// [ThemeData.splashColor].
final Color splashColor;
#override
Widget build(BuildContext context) {
final ThemeData theme = Theme.of(context);
return ClipOval(
child: Material(
type: MaterialType.button,
color: color ?? theme.buttonColor,
child: InkWell(
splashColor: splashColor ?? theme.splashColor,
child: Padding(
padding: padding,
child: icon,
),
onTap: onPressed,
),
),
);
}
}
This code will help you to add button without any unwanted padding,
RawMaterialButton(
elevation: 0.0,
child: Icon(Icons.add),
onPressed: (){},
constraints: BoxConstraints.tightFor(
width: 56.0,
height: 56.0,
),
shape: CircleBorder(),
fillColor: Color(0xFF4C4F5E),
),
Not Material solution:
final double floatingButtonSize = 60;
final IconData floatingButtonIcon;
TouchableOpacity(
onTap: () {
/// Do something...
},
activeOpacity: 0.7,
child: Container(
height: floatingButtonSize,
width: floatingButtonSize,
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(floatingButtonSize / 2),
color: Theme.of(context).primaryColor,
boxShadow: [
BoxShadow(
blurRadius: 25,
color: Colors.black.withOpacity(0.2),
offset: Offset(0, 10),
)
],
),
child: Icon(
floatingButtonIcon ?? Icons.add,
color: Colors.white,
),
),
)
You can use GestureDetector instead of TouchableOpacity library.
You can also use a RaisedButton with an image inside (for example for social login) like this (sizedbox with fittebox is needed to contraint the image on the specified size):
FittedBox(
fit: BoxFit.scaleDown,
child: SizedBox(
height: 60,
width: 60,
child: RaisedButton(
child: Image.asset(
'assets/images/google_logo.png'),
shape: StadiumBorder(),
color: Colors.white,
onPressed: () {},
),
),
),
ClipOval(
child: MaterialButton(
color: Colors.purple,
padding: EdgeInsets.all(25.0),
onPressed: () {},
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(30.0)),
child: Text(
'1',
style: TextStyle(fontSize: 30.0),
),
),
),
Below code will create a Circle of radius 25 and will have white color add icon in it. and If user also want to have click method that can be simply achieved by wrapping a Container widget into GestureDetector() or InkWell().
Container(
height: 50,
width: 50,
decoration: BoxDecoration(
color: Colors.blue,
borderRadius: BorderRadius.circular(50 / 2),
),
child: Center(
child: Icon(
Icons.add,
color: Colors.white,
),
),
),
Just use the circle shape
MaterialButton(
onPressed: () {
print("Circle button pressed");
},
color: Colors.blue,
textColor: Colors.white,
child: Icon(
Icons.favorite,
size: 20,
),
padding: EdgeInsets.all(16),
//use this class Circleborder() for circle shape.
shape: const CircleBorder(),
)
Material 3 / Flutter 3.7.0-
Here is a CircleIconButton widget supporting standard, filled, filled tonal and outlined types from Material 3, as described in https://m3.material.io/components/icon-buttons/overview. The widget supports also toggle feature and enabled/disabled states.
import 'package:flutter/material.dart';
enum CircleIconButtonStyle {
standard,
filled,
filledTonal,
outlined,
}
class CircleIconButton extends StatelessWidget {
const CircleIconButton({
super.key,
required this.icon,
this.circleIconButtonStyle = CircleIconButtonStyle.filled,
required this.onPressed,
this.isSelected,
this.selectedIcon,
});
final IconData icon;
final CircleIconButtonStyle circleIconButtonStyle;
final VoidCallback? onPressed;
/// For toggle buttons
final bool? isSelected;
final Widget? selectedIcon;
#override
Widget build(BuildContext context) {
final ColorScheme colors = Theme.of(context).colorScheme;
return IconButton(
onPressed: onPressed,
icon: Icon(icon),
isSelected: isSelected,
selectedIcon: selectedIcon,
style: _CircleIconButtonStyleProvider.getStyle(
circleIconButtonStyle: circleIconButtonStyle,
isEnabled: onPressed != null,
isSelected: isSelected == true,
colors: colors),
);
}
}
// adapted from samples at https://api.flutter.dev/flutter/material/IconButton-class.html
class _CircleIconButtonStyleProvider {
static ButtonStyle? getStyle({
required CircleIconButtonStyle circleIconButtonStyle,
required bool isEnabled,
required bool isSelected,
required ColorScheme colors,
}) {
switch (circleIconButtonStyle) {
case CircleIconButtonStyle.standard:
return null;
case CircleIconButtonStyle.filled:
return isEnabled
? _enabledFilledButtonStyle(isSelected, colors)
: _disabledFilledButtonStyle(isSelected, colors);
case CircleIconButtonStyle.filledTonal:
return isEnabled
? _enabledFilledTonalButtonStyle(isSelected, colors)
: _disabledFilledTonalButtonStyle(isSelected, colors);
case CircleIconButtonStyle.outlined:
return isEnabled
? _enabledOutlinedButtonStyle(isSelected, colors)
: _disabledOutlinedButtonStyle(isSelected, colors);
}
}
static ButtonStyle _enabledFilledButtonStyle(
bool selected,
ColorScheme colors,
) {
return IconButton.styleFrom(
foregroundColor: selected ? colors.onPrimary : colors.primary,
backgroundColor: selected ? colors.primary : colors.surfaceVariant,
disabledForegroundColor: colors.onSurface.withOpacity(0.38),
disabledBackgroundColor: colors.onSurface.withOpacity(0.12),
hoverColor: selected
? colors.onPrimary.withOpacity(0.08)
: colors.primary.withOpacity(0.08),
focusColor: selected
? colors.onPrimary.withOpacity(0.12)
: colors.primary.withOpacity(0.12),
highlightColor: selected
? colors.onPrimary.withOpacity(0.12)
: colors.primary.withOpacity(0.12),
);
}
static ButtonStyle _disabledFilledButtonStyle(
bool selected,
ColorScheme colors,
) {
return IconButton.styleFrom(
disabledForegroundColor: colors.onSurface.withOpacity(0.38),
disabledBackgroundColor: colors.onSurface.withOpacity(0.12),
);
}
static ButtonStyle _enabledFilledTonalButtonStyle(
bool selected,
ColorScheme colors,
) {
return IconButton.styleFrom(
foregroundColor:
selected ? colors.onSecondaryContainer : colors.onSurfaceVariant,
backgroundColor:
selected ? colors.secondaryContainer : colors.surfaceVariant,
hoverColor: selected
? colors.onSecondaryContainer.withOpacity(0.08)
: colors.onSurfaceVariant.withOpacity(0.08),
focusColor: selected
? colors.onSecondaryContainer.withOpacity(0.12)
: colors.onSurfaceVariant.withOpacity(0.12),
highlightColor: selected
? colors.onSecondaryContainer.withOpacity(0.12)
: colors.onSurfaceVariant.withOpacity(0.12),
);
}
static ButtonStyle _disabledFilledTonalButtonStyle(
bool selected,
ColorScheme colors,
) {
return IconButton.styleFrom(
disabledForegroundColor: colors.onSurface.withOpacity(0.38),
disabledBackgroundColor: colors.onSurface.withOpacity(0.12),
);
}
static ButtonStyle _enabledOutlinedButtonStyle(
bool selected,
ColorScheme colors,
) {
return IconButton.styleFrom(
backgroundColor: selected ? colors.inverseSurface : null,
hoverColor: selected
? colors.onInverseSurface.withOpacity(0.08)
: colors.onSurfaceVariant.withOpacity(0.08),
focusColor: selected
? colors.onInverseSurface.withOpacity(0.12)
: colors.onSurfaceVariant.withOpacity(0.12),
highlightColor: selected
? colors.onInverseSurface.withOpacity(0.12)
: colors.onSurface.withOpacity(0.12),
side: BorderSide(color: colors.outline),
).copyWith(
foregroundColor:
MaterialStateProperty.resolveWith((Set<MaterialState> states) {
if (states.contains(MaterialState.selected)) {
return colors.onInverseSurface;
}
if (states.contains(MaterialState.pressed)) {
return colors.onSurface;
}
return null;
}),
);
}
static ButtonStyle _disabledOutlinedButtonStyle(
bool selected,
ColorScheme colors,
) {
return IconButton.styleFrom(
disabledForegroundColor: colors.onSurface.withOpacity(0.38),
disabledBackgroundColor:
selected ? colors.onSurface.withOpacity(0.12) : null,
side:
selected ? null : BorderSide(color: colors.outline.withOpacity(0.12)),
);
}
}
Try out this Card
Card(
elevation: 10,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(25.0), // half of height and width of Image
),
child: Image.asset(
"assets/images/home.png",
width: 50,
height: 50,
),
)
Card(
elevation: 4.0,
margin: EdgeInsets.zero,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(150),
),
child: InkWell(
onTap: (){},
child: Container(
width: 40,
height: 40,
padding: const EdgeInsets.all(3.0),
decoration: const BoxDecoration(
shape: BoxShape.circle, color: backGroundColor),
child: Image.asset(imageUrl)),
)),
Container(
width: 70.w,
height: 70.h,
alignment: AlignmentDirectional.topCenter,
child: MaterialButton(
onPressed: () {},
color: Color(0xff022C43),
textColor: Colors.white,
child: Icon(
Icons.arrow_forward,
size: 24,
),
padding: EdgeInsets.all(16),
shape: CircleBorder(),
)
)